The page for stdio of the Runtime Library Reference,
http://www.digitalmars.com/rtl/stdio.html#fread
the "Example for fread" contains the line
   printf ("Data read\n %. 256s", buf);

Is that space between the . and 256 a mistake? Nothing is printed. The example below also does not print the string. If the space after . is removed, it works.

(Real email address is zathras at freeuk dot com )


   #include <stdio.h>

   main()
   {
      char buf[]="Hello, world!";
      printf("\nbuf contains: %. 13s", buf);
   }

Arthur Buse wrote:

> The page for stdio of the Runtime Library Reference,
> http://www.digitalmars.com/rtl/stdio.html#fread
> the "Example for fread" contains the line
>    printf ("Data read\n %. 256s", buf);
>
> Is that space between the . and 256 a mistake?

Yes I would think that is a mistake.
The format string should be
"%256s"

Jan

On Mon, 17 Jun 2002 13:37:00 -0400, Jan Knepper <jan@smartsoft.cc> wrote:

>Arthur Buse wrote:
>
>> The page for stdio of the Runtime Library Reference,
>> http://www.digitalmars.com/rtl/stdio.html#fread
>> the "Example for fread" contains the line
>>    printf ("Data read\n %. 256s", buf);
>>
>> Is that space between the . and 256 a mistake?
>
>Yes I would think that is a mistake.
>The format string should be
>"%256s"

Ah, you are too busy to compile and run. <grin>

The buffer is 256 chars and is probably not \0 terminated, just the first 256 chars from some file. "%256s" pads the field with spaces. "%.256s" limits it to 256 chars.

Sorry to go on about this, but people like me are trying to learn from the Runtime Library Reference.

   #include <stdio.h>

   main()
   {
      char buf[]="Hello, world!";

      printf("\nfirst 5 chars of buf: %.5s", buf);
      printf("\nbuf padded to 20 chars: %20s", buf);
   }


Output:
first 5 chars of buf: Hello
buf padded to 20 chars:        Hello, world!


Arthur.
-- 
Windows 95 for Dummies,
Windows ME for the Clinicaly Insane.

"Arthur Buse" <zathris@hotmail.com> wrote in message news:qdmsgukdb92rardnidfm57tbl8hcbn1l3q@4ax.com...
> On Mon, 17 Jun 2002 13:37:00 -0400, Jan Knepper <jan@smartsoft.cc> wrote:
>
> >Arthur Buse wrote:
> >
> >> The page for stdio of the Runtime Library Reference,
> >> http://www.digitalmars.com/rtl/stdio.html#fread
> >> the "Example for fread" contains the line
> >>    printf ("Data read\n %. 256s", buf);
> >>
> >> Is that space between the . and 256 a mistake?
> >
> >Yes I would think that is a mistake.
> >The format string should be
> >"%256s"
>
> Ah, you are too busy to compile and run. <grin>

Actually, the text was translated from pdf format, and the automatic translator inserts random spaces in the output.